Improvement in conductors  punches



J, H. DAVIS.

connvcwons mmcrms.

Patented Nov. 21

NI'IED {STATES PATENT OFFICE JOHN H. DAVIS, OF OOVINGTON, KENTUCKY,ASSIGNOR OF ONE-HALF EIS RIGHT T0 FREDERIGK J. MEYERS, OF SAME PLAGE.

IMPROVEMENT IN CNDUCTORSv PUNCHES.

Speoification forming part of Letters Patent N0. 184,463, dated November21, 1876; applioationfiled September 27, 1876.

T0 all whom it mag; concern:

Be it known that I, JOHN H. DAVIS, 0f Covington, Kanton county,Kentucky, have invented certain new and useful Improvements inConductors Pnnches, of whioh the following is a speoifieation:

This invention relates t0 that dass of punohes employed byrailroad-conduotors am]. others for perforating tiekets, passes, oheoks,&e.; and the first part of my improvexnents consists in providingthehead of the implemenl; with a tapering key, disposed transversely 0t'the plunger. 'lhis key bears against a flat face of said plunger, andthereby assists in confining the latter to a vertical path in the headof the device. Furthermore, said key is eapable of being sei; up tocompensate for any wear either of' the key 0r plnnger.

The second parl: of myinvention consists in slotting one of the ja-ws ofthe implement, and applying transversely of said. slot a pin, to whiohthe plunger is attached. A spiral 01 other suitable spring er elastiocushion is titted in said slotted jaw or handle, so as to bear againstthe pin; and when t;he punoh is operated said spring yields, and therebyprevents any binding of the plunger within the head 0f che implement.

Figure 1 is a side elevation, showin g rny improved punch in its normalposition. Fig. 2 is a longitudinal section of the same closed. Figs. 3and 4 are enlarged. seotional views, taken, respectively, at the lines YY and Z Z. Fig. 5 is a. vertioal section through the upper end of theplunger and its aocessories. Fig. 6 is a perspective view of the plungerdetached frorn the implement, and Fig. 7 represents a modifica.tion ofthe inventio'n.

A represents the head of tl1e implement, fro1n which projeots theoustoxnary ourved handle A, of any oonvenient shape and size. 'lhis headis provided with the customary horizontal slot B, that reoeives the'tiokeb er Slip to be punohed. A flarii1g mouth, b, facilinahes theinsertion of tickets, passes, &o., into said slolz. Head A is providedwith a vertical mortise or groove, G, whioh is 11013 carried down as f2uaus slot B; and said groove has fitted witahin lt a vibrating lever, D,whose rear end or handle D is bent into any convenient shape. The freutend of lever D.is retained in the groove 0 by n1eans of a pivot, E,applied transversely 0f the herd A.- Furthermore, this lever is slottedab d to "reoeive a pin, F, wherewith the plunger G is coupled to saidlever. This plunger is composed of a. round bar of steel er einher hardmetal, and oarries ab its lower end the punoh 0r perforator, H, whichpunch may be made in one pieoe with said plunger; or it may be screwedinto or otherwise attadhed te the seune. The punoh H may be shaped 110cut apertures of any (lesirecl form; or it; rnay be adaped to perforatethe tioket with numerals, or witl1 any selected cornbination ofnumerals. 'lhis plunger is Gut away 011 its front-side, therebyproducing a flat vertical surface, g, .againsl: which one edge of tlietapering key I bears, and thus prevents any rotation ot' said plungerwithin the chambered portion a of the head; Plunger G is gained,g, atit;s upper end 110 admit: che lever D.

Interposed between pin F and the front end of slot d is a spring oryielding cnshion, K, whioh oonnpresses readily when the handles A and Dare caused to approach eaoh other. These handles eure maintain'ed intheir normal positions by a spring, L, that oooupies a chambar, a, inthe head of the implement.

A shoulder or stop, c, ab the front end of groove C, limits the openingof levers A D. Fitted. in the head A is a die, M, of any Suitable hardmetal, seid die being maintained in line with plunger G by upsetting themetal aronnd. said die, as seen ab m in Fig. 3. Located. beneath die Mis a downwardly-fiaring aperture, N, through whioh the punohings drop.

When the implement is in its normal position, as shown in Fig. -1, thespring L distends the levers or handles A D, the shoulder o limiting theopening of said levers. In this eondibion of the implement the plunger Gis elevated far enough to raise the punch .11 above the top of slot B,and thereby afl'ord an unobstruoted passage for the inseraion of hetioket; 0r other artiole to be punohed. The tioket is then inserted inthe slob, and punched in Ehe usual manner by causing the two handles Aam] D to approaoh each other, whioh ach drives the device H through dieM, end

thus perforates'the tieket.

.the same time the free vertical movement; of

plunger G is not interfered Wibh. When handle D is liberated spring Ldisteuds the le Vers A end D, end the plunger G is elevated verticallywithin the head A a.

While this elevation 0f seid plunger is 0ecurring, the tension of springK is gradually relaxing, end by the time levers A D are fully distended,seid spring has foreed the piu F to the rear end of slot d, es seen inFig. 5.

From the above deseription it will be appareni; that the provision 0fdevices d F K permits the levers A end D bein'g opened end closed withthe utmost faeility, while et; the same time the plunger G is confined120 a vertical pa-th within.the head, end consequently the puueh H cannever be injured by contaet with die M.

Tl1is peculiarity of construetion 'renders my implement mueh moreefi'eetive end durable then those devices in which tl1e puneh is applieddirectly 130 0ne end 0f a pivoted handle. This old method ofconstruetion eauses the puneh 150 move in the am of a cirele, end essoon es t;he pivot becomes worn the punch is liable 110 eome in contacl:with the die, end be broken 01 bent. During the ascent' end descent ofplunger G the key I bears against the freut fiel: surface g of seidplunger, end thereby prevents any rotation 0f the latter Within itssoeket a. This provision 0f t he flat;

guide I insures the aecurate passege 0f puneh H thiough die M, end if,an any time, theplunger or key should become worn, the letzter cen thenbe driven in far enough to eompensate for such wear. After the keyhasbeien readjusted it ean be retained in its new position by simplyupsetting the m'etal 0f frame A eround the larger end er head 0f seidkey.

E. 0 is a pivot wherewith the up'per end of seid link is coupled 1:0 thelever D D er the pin F may treverse a. slot of such shape es to allowthe spring 01 cus'nion K beingomitted. Furthermore, a eonieal serew maybe substituted f0i tl1e tapering er wedge guide I, end, in some-cases,two or more er" such screws 0r guides may be employed for e singleplunger.

This elabomtion of the invention will be espeeially epplicable whereeonsiderable stroke is required f0r plunger G.

I elaim es my invention 1 l. In eombination with thevertieally-reeiproea.ting plunger G H, heving e flat f2we, g, theadjustable guide I, substantially es herein deseribed end sei; forth.

2. [Ehe combination,in aconduetors puneh, 0f the slotted end groovedhead A A B O, pivoted end slotted lever D d D E, pin F, plunger G, am].compensating deviee K, substantielly es herein described end sei: f0ith.

3. An improved conduetors puneh, consisting, essentiallyof.iitheslotted, grooved, end

ehambered head A a, a/ B C, pivoted lever D dD E, plunger FG gH, guideI, compensatii1g defiee K, retracting-spring L, end die M, when arrangedwith rei'ereuee 130 eaeh other, subsentially es herein deseribed end setforth.

In testimony of whieh invention I hereuuto Set my band.

. JOHN H. DAVIS. Witnesses:

JAMES H. LAYMAN, FREI). J. MEYERS.

